tests/spec/ext_transform_feedback/negative-prims.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /** @file negative-prims.c
  25  *
  26  * Tests that glBeginTransformFeedback emits errors when attempting to
  27  * draw primitives other than those allowed by the current transform
  28  * feedback primitiveMode.
  29  *
  30  * From the EXT_transform_feedback spec:
  31  *
  32  *     "The error INVALID_OPERATION is generated if Begin, or any
  33  *      command that performs an explicit Begin, is called when:
  34  *
  35  *        * a geometry shader is not active and <mode> does not match
  36  *          the allowed begin modes for the current transform feedback
  37  *          state as given by table X.1."
  38  *
  39  * (the test also executes primitives that should pass, to ensure that
  40  * the test is correctly generating GL errors just due to the bad
  41  * primitives)
  42  */
  43
  44 #include "piglit-util-gl.h"
  45
  46 PIGLIT_GL_TEST_CONFIG_BEGIN
  47
  48         config.supports_gl_compat_version = 10;
  49
  50         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  51         config.khr_no_error_support = PIGLIT_HAS_ERRORS;
  52
  53 PIGLIT_GL_TEST_CONFIG_END
  54
  55 struct {
  56         GLenum tf_prim;
  57         GLenum prim;
  58 } prims[] = {
  59         { GL_POINTS, GL_POINTS },
  60         { GL_LINES, GL_LINES },
  61         { GL_LINES, GL_LINE_STRIP },
  62         { GL_LINES, GL_LINE_LOOP },
  63         { GL_TRIANGLES, GL_TRIANGLES },
  64         { GL_TRIANGLES, GL_TRIANGLE_STRIP },
  65         { GL_TRIANGLES, GL_TRIANGLE_FAN },
  66         { GL_TRIANGLES, GL_QUADS },
  67         { GL_TRIANGLES, GL_QUAD_STRIP },
  68         { GL_TRIANGLES, GL_POLYGON },
  69 };
  70
  71 static bool
  72 test_one_prim(GLenum tf_prim, int i)
  73 {
  74         GLenum error;
  75         const char *prim_name = piglit_get_prim_name(prims[i].prim);
  76         const char *tf_name = piglit_get_prim_name(tf_prim);
  77
  78         glDrawArrays(prims[i].prim, 0, 4);
  79
  80         error = glGetError();
  81         if (prims[i].tf_prim != tf_prim) {
  82                 if (error != GL_INVALID_OPERATION) {
  83                         printf("Expected GL error 0x%x, got 0x%x, when "
  84                                "rendering %s during %s transform feedback\n",
  85                                GL_INVALID_OPERATION, error,
  86                                prim_name, tf_name);
  87                         return false;
  88                 }
  89         } else {
  90                 if (error != 0) {
  91                         printf("Unexpected GL error 0x%x when "
  92                                "rendering %s during %s transform feedback\n",
  93                                error,
  94                                prim_name, tf_name);
  95                         return false;
  96                 }
  97         }
  98         return true;
  99 }
 100
 101 static bool
 102 test_transform_feedback_prim(GLenum tf_prim)
 103 {
 104         bool pass = true;
 105         int i;
 106
 107         glBeginTransformFeedbackEXT(tf_prim);
 108         for (i = 0; i < ARRAY_SIZE(prims); i++) {
 109                 pass = pass && test_one_prim(tf_prim, i);
 110         }
 111         glEndTransformFeedbackEXT();
 112
 113         return pass;
 114 }
 115
 116 enum piglit_result
 117 piglit_display(void)
 118 {
 119         bool pass = true;
 120
 121         pass = pass && test_transform_feedback_prim(GL_POINTS);
 122         pass = pass && test_transform_feedback_prim(GL_LINES);
 123         pass = pass && test_transform_feedback_prim(GL_TRIANGLES);
 124
 125         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 126
 127         /* UNREACHED */
 128         return PIGLIT_FAIL;
 129 }
 130
 131 static const char *vs_source =
 132         "void main()\n"
 133         "{\n"
 134         "       gl_Position = gl_Vertex;\n"
 135         "}\n";
 136
 137 static const char *fs_source =
 138         "void main()\n"
 139         "{\n"
 140         "       gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);\n"
 141         "}\n";
 142
 143 void
 144 piglit_init(int argc, char **argv)
 145 {
 146         float verts[] = {
 147                 -1, -1,
 148                 1, -1,
 149                 1, 1,
 150                 -1, 1
 151         };
 152         GLuint vbo, xfb, vs, fs, prog;
 153         const char *varying = "gl_Position";
 154
 155         piglit_require_extension("GL_EXT_transform_feedback");
 156
 157         piglit_require_gl_version(30);
 158         piglit_require_transform_feedback();
 159
 160         glGenBuffersARB(1, &vbo);
 161         glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
 162         glBufferDataARB(GL_ARRAY_BUFFER_ARB, 8 * sizeof(float),
 163                         verts, GL_DYNAMIC_DRAW);
 164
 165         glGenBuffersARB(1, &xfb);
 166         glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb);
 167         glBufferDataARB(GL_TRANSFORM_FEEDBACK_BUFFER, 4096, NULL,
 168                         GL_DYNAMIC_DRAW);
 169
 170         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
 171         fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
 172         prog = glCreateProgram();
 173         glAttachShader(prog, vs);
 174         glAttachShader(prog, fs);
 175         glTransformFeedbackVaryings(prog, 1, &varying, GL_INTERLEAVED_ATTRIBS);
 176         glLinkProgram(prog);
 177         if (!fs || !vs || !prog)
 178                 piglit_report_result(PIGLIT_FAIL);
 179         if (!piglit_link_check_status(prog))
 180                 piglit_report_result(PIGLIT_FAIL);
 181
 182         glUseProgram(prog);
 183         glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, 0, xfb, 0, 4096);
 184 }